Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15374997ef85f95b09432e9d20c22df6335774710905f2506f070971ac757f18' 
  AND token = 'Y8wJEYF5/uJi0VIep7LCgRzouJ/mUwZWPirlCATf4Y0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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