Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05a256125a6bc98dabb6b8c029ebcbc3f15d65cb11c4d6bc44f9bab66e9f4495' 
  AND token = 'I4Lqz1a7+PjwPy01+naMbpxfemNKVonlhrMbbssNi3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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