Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fe01dd8e5dd08a4e8ff02f3b4d8fc4ebb046bb752bcbe5ecaa1687bca2fc4c5' 
  AND token = 'WcfJrtLbMRAJWYNO40eJu5HiChlmKoxbSXNs0QkiYfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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