Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6addb3c99cf5764f73fb1b41df6c10336ea93fd9e0b5ad1342bce3b95949f188' 
  AND token = 'wKMNmuRA/ykbv60pYow8SL/8MBihcbJW1SRLPuItXmA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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