Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc72ee38eae9c3e8f1feb538982a5002991f424fdd9ad71d99339198e0f8cd70' 
  AND token = '93PA1t9QEagqtEHKb9WBLFj6lHDEj30StaQeq3knzv4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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