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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '058697557fdb68e1b600aee56be530c62924ba8fbfd4ebd362687947337e759b' 
  AND token = 'IfnqNmqEhwFRCJ9uxXuo/PeoV9DTSbPAmO7TclApN5I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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