Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a5992013076b0d9820952024ef6bb3332fbb14a6f4c79aa7326de8d1faa8e67' 
  AND token = 'NwVUsyYN1c1iMCUIviiol72ifFNP3UmLeDFGXEYahgA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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