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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '766b7bd69cd532f2cd99f9797d99ed5915d5c6aa742951de629c6e6a8ef0e190' 
  AND token = 'Njzcqw1KChe3R4Qv2BzDK6obA5eX/1CgWZ2X/H5Y26U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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