Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18795bf323de118f078e1e6b2dcdb8ea55f89c5ab51a03085f41dc80c201cb6e' 
  AND token = 'T2FJdiufGEVfayU61KTbMBH4VsXjrhV0EP2BFX+mfW8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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