Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cd22b9033616f28189d3a16d844832206616a512c1fb4b69a3f3c10da698bd5' 
  AND token = 'NYxB8RuqmyieU2dqoB6MueO6bF+OJUNvGe52u01yUIs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}