Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30bf1feab3b07c7f6d8012bd397cf4a06352fbf6d89d56221578b33122eb77af' 
  AND token = '+FTZUTSQw9w2ecC7Hikf8l+Xxgxu/mmGvXLzgG7Ty6E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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