SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95198cba5df4958472006bc435a6ad9118b1a543294946cf14315bc2028b8433' 
  AND token = 'FOmK34Rs7nTIYqW2L/ueA5oQxIezEG5HSQj+kp7MWCw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}