Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd03dc0c4859d9096bad4de28565d42bd59a2612b2b04b31da160593c53b0810d' 
  AND token = 'l3PoBD0hziLJxPqwpyZGXBh4Sr4EGCIF+TR7JTmAE4Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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