Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63c9842b26d2089dd55c2a59b01afade22c67b699439dbad073dfdedad954b22' 
  AND token = 'MZAyEykjX7HMYMYEA+ltwAlXT68GLruM67QQpsqw22U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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