Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91b62a81202d54cecde48089fa520c6a1af8e7ac7eba9e20618144af50f1f327' 
  AND token = 'c3PaPiqLbufNbloQuDy971k1cV/mZG8Rl7HxoO5kA7Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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