Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c89a6696ac78efb81c296c38f9e3a48b90afa1c418133d6e180c67a0bb06c47b' 
  AND token = 'ucKXQnosMyeTNAri8ZPnr+HFw1tGpSEM+b3CSitkPYI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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