Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f89a6966720a6fd8fba685e9ecaf3f725d32370abe0d44af4642368d86d8e4d' 
  AND token = '5tmQium8Vr2+D7y8P19l8SLBF2gVBV+73RI19GLK9sw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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