Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4806b6d823506d3ebdb1abac60b998b4bc1c4809a0e3c561196ca8227af3e8e0' 
  AND token = 'ktiH6jm9IQd4p+FI1oFzThLGSCxGlnYDqi/U107kVj8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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