Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83454004cf34e2d4681c37b337a3a6702e9ca2331ce6cc873d7b076d4066f4dc' 
  AND token = '2q6xhFYvCT0Cd+rFW70CKixtUT9EHvLOCpJ6t8TAbIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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