Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8ea61e0184edc1165625566230c7a76bac790a4c97ffc5f92a2eec2e4a10ec7' 
  AND token = '7jgZjWt/auXu7XyEJjcLXFvm3FLcue1oUVupgFZXzCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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