Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8487cd521d77ad8ab0c0ad7ed97c38addd31f4b03de4818ee718370cca4245ef' 
  AND token = 'T3Qy5UHt3IQv6U13hOag/rCu8bipv6WoYMBz0E6a/tY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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