Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e84a3328927dd851f41ddcbd2bf57752ffdf7ddba3ba111cb4b21548eaa96ea0' 
  AND token = '1OcXMOJ/phv4YK1B86yWzIbyCvdb6dO/3yP0P7ZnMUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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