Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19888a16a0eb492d2dac64d4f4573339f0544f59ad3fe9b0112a4c5730bf1ed6' 
  AND token = 'p2e2v9MtNvrC0NTLybSexXOTitt2htUlUayKWmOIMXo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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