Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a96fcb1466ec045d11532083e53f030340f4fd5fa33c08a9a8550a46d75de317' 
  AND token = 'XmRQ4C4PW4/TffTjrPox22UgF/67ib7vV77o5GBCSrA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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