Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '424a7bc195f67106491e290840e494231354bcab5a8e0a4a41ebb970b4d91d29' 
  AND token = 'DyegMC1JGPmVYFU3dJVVFlxRd2NTZHfM2FZiU5TBRPE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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