Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d374abb329ff7ceaaaebd1a675a4bf0a2090a3b10769040c97c91e0d8303b39' 
  AND token = '5Yl7QIR+VHTPmJM9jSnjU3R4e+wrvdx7DPOmJ++mqfE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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