SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'bb4afab078f783bd920d6b11cb256bb6331a5a3b3bc7648daceb3dc9630758e7' 
  AND token = 'CjdmCiFiuOcFZVGPYvUaKv/17J7Xa8hjSp7wHYIz0UQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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