Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ffa418cd0f4cbafa865ca1cfe4465b2b91370b95de9f7ae1e76a58ed090fbf5' 
  AND token = '3gg6VHJJM3kHns7QRdu40kN6RafqorLL9ELBGUcj4aM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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