Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f65c9790c8a1918e5583744462b37d8fb13d155c2e904944d4fc77222e5e5a9' 
  AND token = 'mQ++/5x0NyIdMKf2qtVUoccFbojPiKsgQpolwfv4ueI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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