Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd17f7a6275114151b3febff06b001fbe9c3bc30025d27951475902884b10d6ca' 
  AND token = 'IkNzeDqTx6tm89RFhHeHpB7LNNwGL59Z6wNKq855yCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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