Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71bb57cb96633f899f993d45dccdbf0c7f21d87824c10d7d4bd40caaa1cbdc99' 
  AND token = 'hf6f+i2Ow2StWsqmp88EYe2gEhgWh+06zQXFtHFrp1M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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