Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74feddbc9a87c0170a0d078cd8911ecfaa74613d534caa9e2a4269b3ed016917' 
  AND token = 'GQcXcCfYljEEuoWhAliOSvTA4H9DThpMfHmte5nzoRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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