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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2920b30e14c74f44d5ac131cb61e8b8be8d0fb2da6f352114bbd500e0d9cfaf6' 
  AND token = 'TesraNgZBlN6FBh+3gT78ZsWUW3SWsETvd2jXxInIrQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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