Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '852075563f859504da79df58d147eacffa54ae0228a1d728a3581c263e1b5d08' 
  AND token = 'Sr/VYbNg95403ZHgYKY8dOVyKUbY1HnNRNd0n/fFEQM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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