Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc5ceda8924ed176ff6acdb4dae016c607be7b3ebf1574b0dbd24be9fe55442a' 
  AND token = 'XaS52f9VcZzITtAp9Z482gBN12pRD6mtSXTJXHItpFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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