SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8bc9eb56b7674497b937253d2484973ac1115cc8428b4672a87fd9fc3b93aed' 
  AND token = 'ShZfBmpwQEGSkq/fTIjPoPuXyLLk9rBT0FM7Kyz7PfY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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