Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7a7a0da449d7191ef57dbd7c8db0bdeec37e21ca1ab64646fe99647302ac49c' 
  AND token = 'p0K28/CgkwHm1ByGnV6sDPSW8Wh0xzXojT0GV5h5Es4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}