SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'cca0fabc801df85b8d3dadb35b1244ebe17f82477218b18fe8669a699d478b5e' 
  AND token = 'i9BsS7KFeeTNw0Xl3ph/poqo65KVWysjwOYPzyK2sbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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