Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e52063b85886de854bff9643b1261efae434b266f5f18d5e1410cf6df9f5abef' 
  AND token = 'B8SzWylCYB8f6MgSt8yO73LD89qn5iR22CgXlUGWgC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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