Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71d5aa7481d9f8344e24fbb4dd946c3c91999d1c05b534a8899e5cbbc02e761b' 
  AND token = 'g2NfVI2BC7Gm3wUxK0sqNqRui1WwK7EP674Ro7nKQdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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