Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92d9f5b4390961be89aeb9cdaf758ed86f528ee666110d7cb2487ee8a6f31ffc' 
  AND token = 'ymClBOKhdMV002bnZYHETXbDjac2xeMcH+JzKYpfb3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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