Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13d3c18bb92fdc754216253692b8da73c61c956df8fef95fa6900b1602ae04e0' 
  AND token = 'WuYwOrt+d1poxS9SVyDIDUznxYkmRSMAPPc7DS9WAkc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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