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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '760cedcf6fae87d924a361d6c5eea720315053203d7872dbaa3817084ad15d48' 
  AND token = 'ECHmzePudkN/J0Wm53w1BxeYxb8m4bmezPneLiQFZVk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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