Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46736f669bb9084632f1229bed8473f25efbe799f8125a90efa7d8eab31d20d0' 
  AND token = 'u2EdBDdhdqUpMhsH1Go8MZpbI15QVKSN7bNXNdnW5v4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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