Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08bdde1757bae15d3a8e4c4918a4ea3003ca4568ced5e74dc5c40017553fa7f4' 
  AND token = 'G4c/yMigZUCeulZPEZvDjPWrYUNRt7XoGnhzmGhef2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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