Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '428d04fd745f14377d0ff4aac2de0792311172ac712ef1db8d6bed5e490c83ff' 
  AND token = 'mDT7+EOutZ6D8fTX7Lue06pmGchaoIKTvA0jlyteypU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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