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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b14f5cfb6b3da3ac0cdbf707478a1b6df2bf90b227ef14179a6435be0d49154' 
  AND token = 'CVzN7fOVubvv6yDJeadSEeQBil50L2+kFLNwURrVeKM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}