Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1eb99550703c543c64170ed5ea775156a1bebff55df97e5a61a1316252472c01' 
  AND token = 'gVZornndvIirv/K4IZJeEmbnovvcijFcqLFwQb1EOfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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