Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6757aba5ccad779ad843a32d02a3c43c17dcc3d00dea241311da32e5098707eb' 
  AND token = '+D5RAHwHHXqPR6q82j9c4PyT4E6jAiu2bZPWFOJ8Gfs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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