Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ec93a8b6b8e5831ad8e483e0adfbfbc88255687328ad632783066f89b73b75d' 
  AND token = '9W18ZubgnJys+ju8vBH8ECfAWQyv4n/3AGbGios/B3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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