Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d92b3a8387980fa8b0aefdfc029bbb3771d2e28b2886b7780cc682204a7a4af' 
  AND token = 'BwwtgabAs1ZEka5/uudvVVhS6EwyXpgUEcZNBpschNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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