Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bff90c8b7d8685a27b57e8e49c3890c3201a2a4337246220d4550ad6672576c8' 
  AND token = '5QR8zcz0y9cWpeo7nfsmDdTncdsqW+FC+H7cWEI4uWE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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