Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4c28d59de6c94947c69b3d67ec1f8725e285ffb1f7babca6674f01130880493' 
  AND token = 'crrVQRTQiAU/A2Rse+9EIzy1S2Iqq2CKcIUp0SEhdjQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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