Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bc4bf4becd65a66e9b14403ceaac59dc6f2723135c88f8424d4040029345f44' 
  AND token = 'noVNau+McqdHXMVJE4G+AaPLlBBxPJjUk8so/RkV6x8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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