Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cff7efa521916d4be911abb58a1bb494d48008585b9b0781f6d95f0758c8ceba' 
  AND token = '8gXZTzEsjniUSUmpYpjQLmgtppvfDwnfCy0suHJ8IHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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