Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fee60bb3a38d07fe9b9ed65156f16801141a2094cfdebddfcbd63e139fff6563' 
  AND token = '9FnSQM0jPBg0O2SCSQexPJGNT+0bkhC8qLQuHxICHFM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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