Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '691d378ad0b6cac4d44a7f6e07a4d01dc0469c01967c26298773d84cc6b268e8' 
  AND token = 'C+aBhDbPdnjctLBP9Gww0a9qYoGSCrFR9We7M6hpuBo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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