Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd74d6e1aff68e6830f900b0a2edc878e7b50f90bc603c84906ad96a7f9221405' 
  AND token = 'q3bkUeD/Moy3FbBGa3U5Gz4EP8VVHI4eAfoWwX1pDSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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