Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a4dffba2cb5586d19b8dcc35927ed606f0424d2fdffe9f825ba59021f4818b4' 
  AND token = 'ap0PkELNVWQvYWQQtvIingN/EoLH8AnYBI3V9Pdn+Ms=' 
  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"
    }
  }
}