Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '68f80bee8defd315b58c17a345505ea61348cf21d727d8e9537cb3f7503778b0' 
  AND token = 'hsxs6zgqtlLzr4ybmSlswUE2X1G/Yydk8wml4ySA+YM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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