Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ddc000a6fb9e0b9526be654d1a415a1ad36ae044d02dc8d5428e3b54ac36d13' 
  AND token = 'wSkeBnYBQqbdcsrcMl53Ph13LZgAVqichQFvYsckf+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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