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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ea5bad5351e07b654b9af75471d9ac35eb6b6ae1bc99b94ace6507068921cb2' 
  AND token = '5bf+b1IVu3ByXGSu9qXBWENxt6DBKZ+aNw5Qdn5ogAk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}