Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91c92713d78fb12eeb1e829d38f22f627208c12303440bf52450fb4356b8ecf4' 
  AND token = 'rNPUHIeuzeZnzgbDKHWImTfFYyEyhtnxVWl3oDtTHNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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