Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9892347fda2dbeb2851ef2280ff69ff277a76967f949bc12a8306c06db712a0b' 
  AND token = '1UnslO0m5QHuNW6QdEX8PMCsU4YVb3QAetEyaqAKeyo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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