Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e738331be959dc3a1d5372c368961fa84f35a23ded0ab40bcde91bbdfb2d055b' 
  AND token = 'scj4RlUcP9oh9SItN/Jt134dYK+6lQLnMQEBFKMQ+sM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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