Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aac4f7a77f3abac983d6d9fad11c5f6a23ffc7b75eccb782af7a7e6f87b4d69a' 
  AND token = 'Hkw6kIa/ep1v93E8+R7IJf5jyTuplV5TKOq9x30003s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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