Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26d35f0494bbbd97546d7e12c917930aaf0457669e2dc6e1a1bc45474312bb18' 
  AND token = 'PPyXY0FwxulvGSnJgt31+t8Romst2j01+OMxa043IAA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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