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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '636c3735778e88e830b8ec5eaffe9e688b8bcd614ecb7c68dbf127b8c6f4fff2' 
  AND token = 'd9teAyLfapER749RgEnihDU1ik8r1qxzDYYl99p4OOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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