Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8045e355c61daea2f5a3b8a3e0ec6e24950ffcbbeb93751eb6c152dcd537af2' 
  AND token = '1s44VE4qzqVldxlUoQ3JitB2xFqc/F881mfrdTU5FCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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