Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd83433253504b268fc416692505a69d05f508c52be9e5807b51f9c17f30c1f8' 
  AND token = 'YkuHOioWNd7Ch1QuKeLYUZ3QBHvXPfuSO6F2MBZSRmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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